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In vitro production of a TRH-homologous peptide and His-Pro diketopiperazine by human semen
TRH-like peptide His-Pro diketopiperazine peptide biosynthesis in semen
2009/2/23
Fresh human semen, diluted 1:1 v/v with 0.15 M NaCl- 0.05 M phosphate, pH 7.5, undergoes a 3-fold increase in total thyrotropin-releasing hormone (TRH) immunoreactivity on incubation at 4 C for 8 to...
Identification and distribution of Pz-peptidases A and B in human semen
Identification distribution Pz-peptidases A and B human semen
2009/2/23
Human semen was fractionated into fluid, particle and spermatozoal constituents using Percoll density gradient centrifugation followed by additional separation steps. All of the fractions isolated p...
A prospective study of the relationship between semen quality and fertility in cases of unexplained infertility
hamster oocyte penetration sperm motility unexplained infertility
2009/2/20
The male partners of 68 couples exhibiting 5.1 +/- 0.3 (SEM) years of unexplained infertility were assessed using the conventional criteria of semen quality, the movement characteristics of the sper...
Reproductive history and semen analysis in prevasectomy fertile men with and without varicocele
varicocele reproductive history fertile men semen analysis
2009/2/20
A group of 598 allegedly fertile men requesting vasectomy were investigated; varicocele was found in 97 (16.2%) of these men. The mean ages and age distributions of men with and without varicocele w...
Human semen contains thyrotropin releasing hormone（TRH）, a TRH-homologous peptide, and TRH-binding substances
semen TRH vasectomy exclusion ion exchange high pressure chromatography
2009/2/20
High levels of thyrotropin releasing hormone (TRH) and TRH-homologous peptide, with the general structure pGlu=X-Pro-NH2 where X is either Histidine (His) or a neutral amino acid residue, have been ...
The neglected laboratory test. The semen analysis
neglected laboratory test semen analysis
2009/2/19
Sixty-four laboratories from Connecticut, Massachusetts, and California were involved in a comparison of the types of semen analyses offered. The collected data indicate that there is a wide range...
The Presence of Spermatozoa in the Semen of Vasectomized Men
vasectomy sperm follow-up recanalization microrecanalization sperm reappearance
2009/2/19
Repeated semen specimens were examined from 24 men who had been vasectomized for periods of time ranging from two to 31 years. Five-micron filters were used to collect the spermatozoa in each spec...
Relationship of Human Sperm Acrosin and Proacrosin to Semen Parameters. I. Comparisons Between Symptomatic Men of Infertile Couples and Asymptomatic Men, and Between Different Split Ejaculate Fractions
acrosin proacrosin semen spermatozoa split ejaculate fertility infertility
2009/2/19
Acrosin is a sperm serine proteinase whose activity appears to be essential for fertilization in mammals, although this has not been shown in man due to experimental limitations. The present stu...
A Method for the Determination of Chlorinated Pesticides in Human Semen
chlorinated pesticide human semen gas chromatography
2009/2/19
A method is described for the quantitative and qualitative determination of BHC and DDT isomers and HCB and Methoxychlor (DMDT) in human semen. Pesticide residues were extracted with petroleum eth...
The Sources of Carnitine in Human Semen
carnitine seminal vesicles epididymis semen vasectomy
2009/2/19
A study was initiated to determine the sources of carnitine in the male reproductive system. Free and total carnitine was measured in a group of healthy men before and after vasectomy. Each indi...
Observations on Cyclic Nucleotides in Human Semen
semen cyclic AMP cyclic GMP adenylate cyclase fructose
2009/2/19
In agreement with earlier studies, we have found that the human seminal plasma yields considerably higher values for cyclic nucleotides when compared with spermatozoa. However, we have also show...
Nature of the Clearance of Exogenous Testosterone and Progesterone in Ejaculated Bovine Semen
progesterone testosterone blood semen ejaculated
2009/2/19
Plasma and semen concentrations of androgens and progestins were not influenced by repetitive ejaculation in bulls. Within 20 minutes after the injection of testosterone (100 mg Intravenously), plas...
Biochemical Aspects of the Coagulation and Liquefaction of Human Semen
semen coagulation liquefaction enzymes
2009/2/18
The coagulation and liquefaction process of human semen was studied in some detail. It was found that contact of seminal vesicle fluid with the other accessory sex gland secretions or spermatozo...
Brown-colored semen in men with spinal cord injury
Brown-colored semen men spinal cord injury
2009/2/18
The interesting condition of brown-colored semen has often been observed during assisted ejaculation of men with spinal cord injury (SCI). This condition has not been reported in the literature, a...
Fertility and its relationship to motility characteristics of spermatozoa in ewes after cervical, transcervical, and intrauterine insemination with frozen-thawed ram semen
Proline glycine betaine sperm cryopreservation
2009/2/18
The fertility of ewes after artificial insemination and the relationship between fertility and motility characteristics assessed by a computerized motility analysis system were examined with ram semen...